> Here is an interesting subject that I have not seen discussed in my

 years on this list.
 Has anyone tried to duplicate the overriding clutch or whatever it
 is/was on the "twin pack" rotary set up done by that European outfit
 several years ago? Can't remember the name (Swiss company?), I think
 they are out of business. Anyhow, it seems a very elegant solution to a
 high hp redundant twin, esp for helicopters or even a large cabin class
 craft.
 How did that tranny work? The engines were side by side.

 BTW, any word on those PT6 gear drives?
 [Marc Wiese]

   From Ken Welter
  Yes I have here is a photo of my twin pack that will go on the 4
place coot that I am starting to build, I installed this pack on my
present coot and tested it for 11 hrs and was a bit heavy for it but
should work on the bigger one, the front engine is a 670 Rotax
snowmobile engine that puts out 125 hp but there is no reason that it
should not work with two rotary's however part of the design to stop
resonant vibration is to run two very different rpm's so you would
run two different gear ratios and I would suggest running a 12a and a
13b, the spag clutches that I used were made by SSK and sold by Morse.

Ken we just realized what this message was all about.
We have been looking at a way to run a pair of rotary's together for a helicopter

engine.
Do you have any more details, pictures, drawings etc on this setup.
Royce

 
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